局域网扫描

#include <windows.h>#include <IPHlpApi.h>#include <stdio.h>#pragma comment(lib,"ws2_32")#pragma comment(lib,"Iphlpapi")DWORD WINAPI ThreadProc(LPVOID lpParam);int main(int argc,char *argv[]){    CRITICAL_SECTION cs;    InitializeCriticalSection(&cs);    printf("LAN MAC Scan ...\r\n");    for (int i = 0; i < 255; i ++)    {        EnterCriticalSection(&cs);        CreateThread(NULL,0,ThreadProc,(LPVOID)i,0,NULL);        LeaveCriticalSection(&cs);    }    DeleteCriticalSection(&cs);        return 0;}DWORD WINAPI ThreadProc(LPVOID lpParam){    int i = (int)lpParam;    char desIp[16] = { 0 };    lstrcpy(desIp,"192.168.1.");        char sub[4] = { 0 };        char tmpIp[16] = { 0 };        u_char arDestMac[6] = {0xff,0xff,0xff,0xff,0xff,0xff};    ULONG ulLen = 6;        DWORD ret = 0;        wsprintf(sub,"%d",i);    lstrcpy(tmpIp,desIp);    lstrcat(tmpIp,sub);    ret = SendARP(inet_addr(tmpIp),NULL,(ULONG *)arDestMac,&ulLen);        if (ret == NO_ERROR)    {        printf("ip = %15s,mac = ",tmpIp);        for (int k = 0; k < 5; k ++)        {            printf("%02X-",arDestMac[k]);        }        printf("%02X\r\n",arDestMac[k]);    }    return 0;}